I barched from 1800 to master in three days. I was low-TH9 and I had lvl 5 archer and lvl 6 barbarian. That was suprisingly easy, but you have to stay online whole day. The hardest part is to get from 2200 to 2400, foward it's not that hard. When I was in master, I felt it's possible to go to master 2, too, so I recommend you to use Barch, but if you can't stay online very much, then you should use Balloonion.
